CHAPTER 5: SETPOINTS 5.4 PROTECTION ELEMENTS
GEK-106310-AF F650 DIGITAL BAY CONTROLLER 5-53
Table 5-28: Tripping time in seconds for ANSI curves
Dial Current (I/Itap)
1.5 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0
10.0
ANSI Extremely inverse
0.50 2.000 0.872 0.330 0.184 0.124 0.093 0.075 0.063 0.055 0.049
1.00 4.001 1.744 0.659 0.368 0.247 0.185 0.149 0.126 0.110 0.098
2.00 8.002 3.489 1.319 0.736 0.495 0.371 0.298 0.251 0.219 0.196
4.00 16.004 6.977 2.638 1.472 0.990 0.742 0.596 0.503 0.439 0.393
6.00 24.005 10.466 3.956 2.208 1.484 1.113 0.894 0.754 0.658 0.589
8.00 32.007 13.955 5.275 2.944 1.979 1.483 1.192 1.006 0.878 0.786
10.00 40.009 17.443 6.594 3.680 2.474 1.854 1.491 1.257 1.097 0.982
ANSI Very Inverse
0.50 1.567 0.663 0.268 0.171 0.130 0.108 0.094 0.085 0.078 0.073
1.00 3.134 1.325 0.537 0.341 0.260 0.216 0.189 0.170 0.156 0.146
2.00 6.268 2.650 1.074 0.682 0.520 0.432 0.378 0.340 0.312 0.291
4.00 12.537 5.301 2.148 1.365 1.040 0.864 0.755 0.680 0.625 0.583
6.00 18.805 7.951 3.221 2.047 1.559 1.297 1.133 1.020 0.937 0.874
8.00 25.073 10.602 4.295 2.730 2.079 1.729 1.510 1.360 1.250 1.165
10.00 31.341 13.252 5.369 3.412 2.599 2.161 1.888 1.700 1.562 1.457
ANSI Normally inverse
0.50 2.142 0.883 0.377 0.256 0.203 0.172 0.151 0.135 0.123 0.113
1.00 4.284 1.766 0.754 0.513 0.407 0.344 0.302 0.270 0.246 0.226
2.00 8.568 3.531 1.508 1.025 0.814 0.689 0.604 0.541 0.492 0.452
4.00 17.137 7.062 3.016 2.051 1.627 1.378 1.208 1.082 0.983 0.904
6.00 25.705 10.594 4.524 3.076 2.441 2.067 1.812 1.622 1.475 1.356
8.00 34.274 14.125 6.031 4.102 3.254 2.756 2.415 2.163 1.967 1.808
10.00 42.842 17.656 7.539 5.127 4.068 3.445 3.019 2.704 2.458 2.260
ANSI Moderately inverse
0.50 0.675 0.379 0.239 0.191 0.166 0.151 0.141 0.133 0.128 0.123
1.00 1.351 0.757 0.478 0.382 0.332 0.302 0.281 0.267 0.255 0.247
2.00 2.702 1.515 0.955 0.764 0.665 0.604 0.563 0.533 0.511 0.493
4.00 5.404 3.030 1.910 1.527 1.329 1.208 1.126 1.066 1.021 0.986
6.00 8.106 4.544 2.866 2.291 1.994 1.812 1.689 1.600 1.532 1.479
8.00 10.807 6.059 3.821 3.054 2.659 2.416 2.252 2.133 2.043 1.972
10.00 13.509 7.574 4.776 3.818 3.324 3.020 2.815 2.666 2.554 2.465
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